[Trilinos-Users] [EXTERNAL] Epetra_Operator as Stratimikos preconditioner

[Salinger, Andrew]

Nico,

Here's some code that you can use as a working use case. Look in:
  packages/nox/src-epetra/NOX_Epetra_LinearSystem_Stratimikos.C

If you have an operator that approximates the inverse of the matrix, then
search for (precMatrixSource == UserDefined_)  (See Line 518).
If you have a matrix that approximates the true matrix that you want
to use to generate a preconditioner using ILU/ML, then look for
precMatrixSource == SeparateMatrix (see line 484).

This class is often called from packages/piro/src/Piro_Epetra_NOXSolver.cpp
if you want to see how it is used.
Hope this helps,
Andy


From: Nico Schlömer <nico.schloemer at gmail.com<mailto:nico.schloemer at gmail.com>>
Date: Wednesday, June 3, 2015 at 7:24 AM
To: "trilinos-users at trilinos.org<mailto:trilinos-users at trilinos.org>" <trilinos-users at trilinos.org<mailto:trilinos-users at trilinos.org>>
Subject: [EXTERNAL] [Trilinos-Users] Epetra_Operator as Stratimikos preconditioner

Hi,

I'd like to use an Epetra_Operator (which I could wrap as Thyra::LinearOpBase) as a preconditioner for a Thyra::LinearOpWithSolveFactoryBase.
How can I do that?

Cheers,
Nico
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